> As it was discussed a while back on the mailing lists, Unionfs is trying to> be smart and tries to do reallocation on its own. The way it does it makes> it depend on some internals of the SLAB allocator. There have been some> patches out there for a realloc function (by Pekka Enberg, IIRC), but as far> as I can tell, they haven't been merged in.